The SAA4955TJ is a 2.9-Mbit field memory designed for advanced TV applications such as 100/120 Hz TV, PALplus, PIP and 3D comb filter. Its features include: 2949264-bit field memory, 245772 × 12-bit organization, 3.3 V power supply, inputs fully TTL compatible when using an extra 5 V power supply, high speed read and write operations, FIFO operations, optional random access by block function, quasi static operation, write mask function, cascade operation possible, 16 Mbit CMOS DRAM process technology, 40-pin SOJ Package.
The SAA4955TJ is a 2.9-Mbit field memory designed for advanced TV applications such as 100/120 Hz TV, PALplus, PIP, and 3D comb filters. It features a 24576 x 12-bit organization and supports high-speed read and write operations. The device includes FIFO operations for full word continuous read and write, as well as independent read and write pointers, and can operate in a quasi-static mode with internal self-refresh and clocking pauses of infinite length.
| Memory Capacity | 2.9-Mbit |
|---|---|
| Supply Voltage | 3.3 V |
| Package | SOJ40 |
The device requires a +3.3 V supply voltage on pins 19 and 22, while pins 20 and 21 can be connected to a supply between +3.3 V and +5.5 V.
Write operations between two successive reset operations must contain at least 40 SWCK write clock cycles while the WE signal is HIGH.
Block address values between 0 and 6143 are considered valid, as values outside this range can cause abnormal operation or a lock-up condition.